Dialpad Headset, Coodio Corded Phone Headset [Call Center] Telephone Headset [Noise Cancelling] [Protein Earmuff] Binaural Headphone With Mic Microphone 4-Pin RJ9 For Desk Telephone Dialpad - HS2 Hands-free, protein earmuff provide all day comfort. Boom-style noise cancelling microphone adjustable for optimum level Reversible for use with either ear, comfortable, lightweight design Binaural headsets are widely used in not-so-quiet working surroundings. Excellent for use with Call Center Service, Telephone Counseling Services, Insurance, Hospitals, Banks, Telecom Operators, Enterprises